Which one has longer cycle life, polymer lithium battery or lithium battery?

Currently, there are types of batteries on the market, mainly secondary battery nickel metal hydride (Ni - MH) and lithium ion (Li - ion) batteries. Lithium-ion batteries are available in liquid lithium-ion batteries (LiB) and polymer lithium-ion batteries (LiP). In many cases, the battery marked Li - ion must be a lithium-ion battery, but may be not a liquid lithium-ion battery. It is also possible to be the polymer lithium-ion batteries.

Lithium-ion battery is the improved product of lithium-ion batteries. Lithium batteries have long ago, but it is a kind of highly active (remember its position in the periodic table?)Metal, it is not safe when using, often burning during charging, burst, and then there is the modified lithium ion battery, joined the inhibit lithium active ingredients (such as cobalt, manganese, etc.) so that the lithium electricity real reached a safe, efficient, convenient, and old lithium batteries has been basically eliminated. As for how to distinguish them, will be able to identify from the battery logo, lithium batteries for Li, lithium ion battery for Li - ion. Now, laptops and mobile phones using the so-called "lithium battery", are lithium-ion batteries.

The basic structure of modern batteries including the anode, cathode and electrolyte three elements. As one kind of batteries, lithium-ion battery also has the three elements. General lithium-ion technology using liquid or inorganic gel electrolyte, so need to accommodate combustible solid shell, the active ingredient, this increases the weight of the battery and cost, also limits the size and shape of flexibility. In general, the smallest thickness of liquid lithium ion secondary battery is 6 mm, then the decrease was more difficult.

And the so-called polymer lithium ion battery is in the three main structure at least one or more than one use of polymer materials as its main battery system.

A new generation of polymer lithium ion battery has very high on the degree of polymerization of materialized, so the shape can be thin shape is changed (0.5 mm the thinnest) and arbitrary shape, arbitrary area, greatly improving the battery design flexibility, which can meet the needs of the product, made into any shape and the capacity of the battery. At the same time, polymer lithium ion battery energy per unit of a 50% increase over the current general lithium ion battery, its capacity, charge and discharge characteristics, safety, working temperature range, the cycle life and environmental performance, and so on are the lithium ion battery has greatly improved.

Now on the market sales of liquid lithium ion batteries (LiB) in the case of the overcharge, easy to cause the relief valve to crack and the situation of the fire, it is very dangerous, so must add protection IC circuit in order to ensure the battery overcharge situations will not occur. And polymer lithium ion battery, this type of battery in terms of relative liquid lithium ion battery has good resistance to charge and discharge characteristics, therefore to protect plus IC circuit requirements may be extended appropriately. Moreover in terms of charging, polymer lithium ion battery can use IC constant current charging, and adopted by the lithium ion secondary battery CCCV (ConstantCurrert - ConstantVoltage) compared to the time needed for charging way can shorten the waiting time of many.

The application of lithium batteries, mobile phone manufacturers

Although in recent years, almost all manufacturers have tended to use lithium ion battery, but the world each big mobile phone maker's choice of battery or have their own characteristics and habits, such as once in the same historical period.

Nokia: the Ni - MH (Nickel hydrogen) batteries, LiB (liquid lithium ion batteries, not using LiP (polymer lithium ion batteries.

Ericsson: the Ni - MH battery, LiB batteries, LiP.

MOTOROLA: the Ni - MH battery, LiB, not LiP cell.

It's not hard to find, from the earliest for the mobile use LiP, polymer lithium ion battery this Ericsson embody the essence of technology pioneer of his mobile phone. According to the information I found, the main manufacturers of polymer lithium-ion batteries are Japan's SONY, Panasonic, GS and other companies. In 2000, the production volume reached 21 million, of which 50% were Ericsson mobile phones. To enter in 2002, lithium ion battery in other mobile phone makers have also been a wide range of application and popularization. But in the use of polymer lithium ion battery, is far from reach gained popularity in all mobile phone manufacturers of products, widely used remains to be time.

, on the other hand, although the advantages of lithium ion batteries, but also have defects, such as high prices and fewer charge and discharge and so on. Lithium battery charge and discharge times only 400-600, specially improved products but also more than 800 times. And charging of NiMH batteries can reach more than 700 times, some good quality product to charge and discharge of up to 1200 times, such a comparison, nickel metal hydride batteries to live longer than lithium battery. In addition, the price of nickel metal hydride batteries is much lower than lithium batteries. But strictly speaking, lithium batteries will also has a memory effect, only the memory effect is very low, basically can be neglected.

That should be paid attention to in using lithium battery, battery placed after a period of time to enter a dormant state, capacity is lower than normal at this time, use time is shortened. But the lithium battery is easy to activate, if after 3-5 times the normal charge and discharge cycle can activate cells, back to normal capacity. Due to the characteristics of lithium battery itself, determines its almost no memory effect. So new lithium-ion batteries in the user's phone in the process of activation, is don't need special method and the device. Is so in theory, not only from my own practice, from the start with a standard method to charge this way of "natural activation" is the best.

For the "activation" of lithium-ion batteries, many say: charging time must be more than 12 hours, repeated three times in order to activate the battery. This kind of saying that "the first three charges should be charged for more than 12 hours", apparently from nickel battery, such as nickel cadmium and nickel metal hydride) continue down. So that, the outset misinformation, so to speak. Lithium-ion and nickel batteries charging and discharging characteristics have very big difference, and can be very clear tell you, I have looked at all serious formal technical data will emphasize overcharge and over discharge of lithium batteries, especially liquid lithium ion battery caused great damage. And charging in accordance with the best charging standard time and standard methods, especially don't charging for more than 12 hours long. Usually, the introduction of charging method, on the phone's manual standard charging method is suitable for the mobile phone.

In addition, the lithium battery cell phone or the charger will automatically stop after the battery, there is no nickel electric charger of the so-called "trickle charging for 10 hours. That is to say, if your lithium battery, after full on the charger is Bai Chong. And none of us there is no guarantee that the battery charge and discharge protection circuit will never change and quality according to the features of foolproof, so your battery will be on the brink of danger for a long time. This is another reason we object to a longer charge.

Charging in addition on the phone for some, after more than a certain amount of time, if you don't go to remove the charger, the system does not stop charging, will also begin to discharge - charging cycles. Perhaps this vendor has its purpose, but apparently for life of battery and mobile phone/charger is unfavorable. At the same time, the charging takes a long time long, often need to be done in the night, and to power grid in China, many places are relatively high voltage in the night, and volatile. Have already said, in front of the lithium battery is very delicate, it is better than nickel electric resistance to fluctuation in charging and discharging ability worse, so it brings the risk of additional.

In addition, another aspect that cannot be ignored is that lithium batteries are also not suitable for over-discharge, and over-discharge is also disadvantageous for lithium batteries. This leads to the following problem.

2, when in normal use should start charging

On our BBS, often can see this statement, because the number of charge and discharge is limited, so should be mobile phone battery electric light recharging as much as possible. But I found an experimental table on the charge and discharge cycle of lithium-ion batteries. The data on cycle life are listed below:

Cycle lifetime (10% DOD) : > 1000 times

Cycle lifetime (100% DOD) : > 200 times

The DOD is the abbreviation of the depth of discharge. From the table, but the depth of the number of charging and discharging, 10% DOD cycle life than 100% DOD much longer., of course, if the conversion to the actual charge relative to the total capacity: * 1000 * 200 = 200 = 100100%, 10% of the latter to fully charge and discharge is still relatively good, but in front of the net friend of the idea to do some correction: under normal circumstances, you should reserve the charge according to the principle that the remaining battery power is used up and recharge, but if your battery is not likely to stick to the whole day on the 2nd day, you should start charging in time, of course, if Willing to carry the charger to the office is another matter.

And you need to charge for the upcoming is expected to lead to the communication of the most important events in the busy, even when there are a lot more than battery, so you can just charge in advance, because you didn't really lose "1" time charge cycle life, namely "0. X", and often the x will be small.

The principle of battery remaining power run out to refill is not want you to extremes. As widespread and long charging a saying that is "as far as possible put the cell phone battery power run out, had better use automatic shutdown". The practice of this kind of practice is just nickel batteries, purpose is to avoid the memory effect, unfortunately it also in lithium battery of circulating on today. Some people have used the example of automatic shutdown since they have been warning that the mobile phone battery is too low. The result from this example phone no response in the later charging and boot, had to send to the maintenance of the service. This is because the battery voltage is too low, caused by the excessive discharge that do not have normal charging and boot conditions.

3, the correct approach for lithium battery cell phone

Boil down to, I on the problem of lithium battery cell phones in use is the most important tip:

1, according to the standard time and procedure charging, even so will three times before;

2, when there is a hint when battery power is too low, should try to start charging in a timely manner;

3, the activation of the lithium battery does not need special method, in the normal use of mobile phone lithium batteries will naturally activation. If you insist on using the "first three 12-hour long charge activation" method that is circulated, it will not actually work.

Therefore, all the pursuit of 12 hours of ultra-long charging and the use of lithium battery mobile phones to automatically shut down are wrong. If you have done it in the wrong way, please correct it in time, maybe it is not too late.

Of course, in the mobile phone and charger itself under the condition of good quality, protection and control circuit for lithium battery protection still has quite a guarantee. So the understanding of charging rules is the key, in some cases, also can make some concessions. Such as you find mobile phone must be charge before you sleep at night, you can also start charging before going to bed. The crux of the problem is that you should know what is the right thing to do, and do not deliberately according to error.

Now tell me something about Lithium polymer battery：

Now about polymer lithium-ion battery.

Before speaking to correct people prone to a big mistake!!!!!!

Many people go to that house, " Lithium polymer battery" solid state lithium-ion battery, donno the legal name of the real specification, should call into" polymer lithium-ion battery ".: o

The bigger and bigger misunderstanding is that people think that nickel-cadmium, nickel-hydrogen, lithium-ion, and polymer lithium-ion batteries are four different types of batteries. In fact, very, very, between lithium-ion batteries and polymer lithium-ion batteries. The relationship should be clarified here.

So-called "polymer lithium ion battery", is actually the lithium ion battery series products of a kind of the seeds, in fact its main components: the anode, cathode and electrolyte and working principle and the use of liquid electrolyte of lithium ion battery, just the diaphragm and the packaging material is different, therefore, in the final analysis it in essence, is a kind of lithium-ion battery!:

Polymer lithium ion (Lithiumionpolymer) batteries, higher energy density, miniaturization, thin, lightweight, high safety, long cycle life and low cost of battery. Therefore, in the next two to three years, the lithium polymer battery will replace the lithium-ion battery market share of 50%.

The first principle of the article

Lithium-ion batteries currently have two types of liquid lithium-ion batteries (LIB) and polymer lithium-ion batteries (PLIB). Among them, the liquid lithium ion battery refers to a secondary battery in which the Li+ intercalation compound is a positive electrode or a negative electrode. The positive electrode is made of lithium compound LiCoO2, LiNiO2 or LiMn2O4, and the negative electrode is made of lithium-carbon intermetallic compound LixC6,

Principle and liquid lithium polymer lithium ion battery is the same, the main difference is that the electrolyte is different from liquid lithium. The main structure consists of the positive and negative battery electrolyte three elements. So-called polymer lithium ion battery is said in the three main structure at least one or more than one use of polymer materials as the main battery system. But in the current development of polymer lithium ion battery systems, polymer materials are mainly used in the anode and electrolyte. Anode materials include conductive polymer or lithium ion batteries used in inorganic compounds commonly, use solid electrolyte or colloidal polymer electrolytes, or organic electrolyte, lithium ion technology commonly used liquid or gel electrolyte, so need to accommodate combustible solid secondary packaging, the active ingredient, this increases the weight, in addition also limits the size of flexibility. And there is no redundant electrolyte in polymer lithium-ion technology, so it is more stable, not easy also because of much of the battery charging, collision or other damage, as well as overuse and cause dangerous situation.

A new generation of polymer lithium ion battery in shape can be thin shape is changed (ATL battery can reach 0.5 mm, the thinnest phase in the thickness of the card) and arbitrary shape, arbitrary area, greatly improving the battery design flexibility, which can meet the needs of the product, made into any shape and the capacity of the battery, for the application equipment developers on the power supply solution provides a high degree of design flexibility and adaptability, in order to maximize the optimization of its product performance. At the same time, polymer lithium ion battery energy per unit of a 50% increase over the current general lithium ion battery, its capacity, charge and discharge characteristics, safety, working temperature range, cycle life (more than 500 times) and a lithium ion battery in such aspects as environmental performance has improved significantly.

The second characteristics and comparison

The overview, the characteristics of polymer lithium ion battery

Depending on lithium ion battery electrolyte materials used in lithium ion battery can be divided into liquid lithium ion battery (lithiumionbattery, referred to as the LIB) and polymer lithium ion battery (polymerlithiumionbattery, referred to as LIP) two kinds big. Is used in the polymer lithium ion battery cathode materials and liquid lithium ion is the same, the working principle of battery is almost the same. Their main difference is that the different electrolyte, lithium ion battery using the liquid electrolyte, polymer lithium ion battery with solid polymer electrolyte as a substitute for, the polymer can be "dry", also can be "colloidal", at present most of the polymer gel electrolyte.

Polymer lithium ion battery can be divided into three categories: (1) solid polymer electrolyte of lithium ion battery. For polymer electrolyte with a mixture of salt, the battery the ionic conductivity at room temperature is low, suitable for high temperature use. (2) gel polymer electrolyte of lithium ion batteries. In the solid polymer electrolyte adding plasticizer and other additives, so as to improve the ionic conductivity, the battery can be used at room temperature. (3) polymer cathode material of lithium ion battery. Using conductive polymers as the anode material, the specific energy is three times as many existing lithium ion battery, is the latest generation of lithium ion batteries.

Since the liquid electrolyte is replaced by a solid electrolyte, the polymer lithium ion battery has the advantages of being thinner, arbitrarily aread, and arbitrarily shaped, and does not cause leakage, combustion, explosion, and the like. Therefore, the aluminum alloy composite film can be used to manufacture the battery casing, thereby increasing the specific capacity of the entire battery; the polymer lithium ion battery can also use the polymer as the positive electrode material, and the mass ratio energy will be increased by 50% compared with the current liquid lithium ion battery. the above. In addition, polymer lithium-ion batteries are more efficient than lithium-ion batteries in terms of operating voltage, charge and discharge cycle life, and the like. Based on the above advantages, the polymer lithium ion battery is known as the next generation lithium ion battery.

Second, the comparison of polymer and liquid lithium battery

Due to the different production processes of various manufacturers, the polymer lithium battery currently on the market is divided into two types: winding type (represented by Sony and Toshiba) and laminated type (represented by TCL and ATL), but the specifications adapted to the demand of mobile phones. Most are below 4mm thickness. Compared with liquid, the adoption of the polymer packaging of aluminum film is thinner and thinner than steel shell, aluminum shell, and the mode of production is different from liquid lithium electricity, polymer, the thinner the better production theory can produce 0.5 mm below the thickness of the battery.

Liquid lithium electricity on the contrary, the thicker the better production, less than 4 mm thickness of the battery is difficult to produce, even if produced, is clearly polymer li-ion battery capacity, cost advantage. Thus, the thinner the battery, the lower the polymer production cost and the higher the liquid production cost.

But thicker on the specification of liquid lithium electricity supply chain mature, mature technology, high production efficiency, high yield, strong manufacturing cost advantages. From the point of the market, 5 mm, 6 mm thickness series of liquid lithium battery although than 3 mm, 4 mm thickness series battery capacity is much higher, but the price is much lower. Polymer in theory, in 5 mm, 6 mm thickness specifications on the material cost and liquid is close to, but at present the craft of 5 mm, 6 mm series battery costs a lot higher than the density of its liquid, therefore, in this specification and liquid form real competition, there are a lot of distance.

General battery main structure consists of the anode, cathode and electrolyte three elements. So-called polymer lithium ion battery is said in the three main structure at least one or more than one use of polymer materials as the main battery system. But in the current development of polymer lithium ion battery systems, polymer materials are mainly used in the anode and electrolyte. The anode materials include conductive polymer or lithium ion batteries used in inorganic compounds commonly, use solid electrolyte or colloidal polymer electrolyte, or organic electrolyte, cathode is usually use lithium metal or lithium carbon compounds between the layers. General lithium-ion technology using a liquid or gel electrolyte, so need to accommodate combustible solid secondary packaging, the active ingredient, this increases the weight and cost, in addition also limits the size of flexibility. And there is no redundant electrolyte in polymer lithium-ion technology, so it is more stable, not easy also because of much of the battery charging, acupuncture, collision or other damage, as well as overuse and cause dangerous situation.

A new generation of polymer lithium ion battery in shape can be thin shape is changed (0.8 mm the thinnest) and arbitrary shape, arbitrary area, greatly improving the battery design flexibility, which can meet the needs of the product, made into any shape and the capacity of the battery, for the application equipment developers on the power supply solution provides a high degree of design flexibility and adaptability, in order to maximize the optimization of its product performance. At the same time, polymer lithium ion battery energy per unit of a 50% increase over the current general lithium ion battery, its capacity, charge and discharge characteristics, safety, working temperature range, cycle life (more than 500 times) and a lithium ion battery in such aspects as environmental performance has improved significantly.

Polymer lithium ion batteries

The difference between a polymer lithium ion battery and a normal battery is on the electrolyte. In the original design of the 1970s, solid polymer electrolytes were used. This type of electrolyte is similar to a plastic film and does not conduct electrons but allows ion exchange (atoms or radicals that can be charged). The polymer electrolyte replaces the conventional porous membrane impregnated with the electrolyte. The design of the dry polymer electrolyte allows for simplified assembly, improved battery mechanical strength, safety, and the ability to be fabricated into an ultra-thin geometry. The thickness of a single battery can be as thin as 1 mm. Equipment designers are able to design the shape and size of the battery based on their imagination. Unfortunately, solid polymer lithium ion batteries are subject to their poor electrical conductivity. The internal resistance is too high to provide the high pulse current required by the current communication device and cannot drive the hard disk of the notebook. Heating the battery to 60 degrees Celsius, the conductivity is rapidly increasing, but such requirements are not suitable for use in portable devices.

As a compromise, some gel electrolytes have been introduced. Most mobile phone polymer lithium-ion batteries currently on the market are hybrid batteries containing gel electrolytes. Lithium-ion polymers have been used to modify this system, making it the only polymer power source currently used in portable devices. Lithium ion polymer battery and general lithium ion battery after adding gel electrolyte

What is the difference? Although the two batteries are very similar in performance, the lithium ion polymer replaces the porous membrane as the only solid electrolyte. The gel electrolyte only increases the ionic conductance. Polymer lithium-ion batteries are not as popular as some analysts have predicted. Its superiority and low manufacturing costs have not been recognized. Because its capacity has not improved, in fact, the capacity is slightly reduced compared to standard lithium-ion batteries. The market for polymer lithium-ion batteries is used in applications such as ultra-thin geometric power supplies, such as credit card power supplies.

The page contains the contents of the machine translation.